a76877e977
* environ.cc (environ_init): Drop setting allow_ntsec here. * grp.cc (initgroups32): Drop usage of label "out". * security.cc (allow_ntsec): Set to true by default. * syscalls.cc (seteuid32): Remove label success_9x. * wincap.cc: Remove has_security throughout. * wincap.h: Ditto.
305 lines
7.4 KiB
C++
305 lines
7.4 KiB
C++
/* passwd.cc: getpwnam () and friends
|
|
|
|
Copyright 1996, 1997, 1998, 2001, 2002, 2003, 2007 Red Hat, Inc.
|
|
|
|
This file is part of Cygwin.
|
|
|
|
This software is a copyrighted work licensed under the terms of the
|
|
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
|
|
details. */
|
|
|
|
#include "winsup.h"
|
|
#include <stdlib.h>
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include "cygerrno.h"
|
|
#include "security.h"
|
|
#include "path.h"
|
|
#include "fhandler.h"
|
|
#include "dtable.h"
|
|
#include "pinfo.h"
|
|
#include "cygheap.h"
|
|
#include <sys/termios.h>
|
|
#include "pwdgrp.h"
|
|
|
|
/* Read /etc/passwd only once for better performance. This is done
|
|
on the first call that needs information from it. */
|
|
|
|
passwd *passwd_buf;
|
|
static pwdgrp pr (passwd_buf);
|
|
|
|
/* Parse /etc/passwd line into passwd structure. */
|
|
bool
|
|
pwdgrp::parse_passwd ()
|
|
{
|
|
# define res (*passwd_buf)[curr_lines]
|
|
res.pw_name = next_str (':');
|
|
res.pw_passwd = next_str (':');
|
|
if (!next_num (res.pw_uid))
|
|
return false;
|
|
if (!next_num (res.pw_gid))
|
|
return false;
|
|
res.pw_comment = NULL;
|
|
res.pw_gecos = next_str (':');
|
|
res.pw_dir = next_str (':');
|
|
res.pw_shell = next_str (':');
|
|
return true;
|
|
# undef res
|
|
}
|
|
|
|
/* Read in /etc/passwd and save contents in the password cache.
|
|
This sets pr to loaded or emulated so functions in this file can
|
|
tell that /etc/passwd has been read in or will be emulated. */
|
|
void
|
|
pwdgrp::read_passwd ()
|
|
{
|
|
load ("/etc/passwd");
|
|
|
|
char strbuf[128] = "";
|
|
bool searchentry = true;
|
|
struct passwd *pw;
|
|
/* must be static */
|
|
static char NO_COPY pretty_ls[] = "????????:*:-1:-1:";
|
|
|
|
add_line (pretty_ls);
|
|
cygsid tu = cygheap->user.sid ();
|
|
tu.string (strbuf);
|
|
if (myself->uid == ILLEGAL_UID)
|
|
searchentry = !internal_getpwsid (tu);
|
|
if (searchentry &&
|
|
(!(pw = internal_getpwnam (cygheap->user.name ())) ||
|
|
(myself->uid != ILLEGAL_UID &&
|
|
myself->uid != (__uid32_t) pw->pw_uid &&
|
|
!internal_getpwuid (myself->uid))))
|
|
{
|
|
static char linebuf[1024]; // must be static and
|
|
// should not be NO_COPY
|
|
cygheap->user.ontherange (CH_HOME, NULL);
|
|
snprintf (linebuf, sizeof (linebuf), "%s:*:%lu:%lu:,%s:%s:/bin/sh",
|
|
cygheap->user.name (),
|
|
myself->uid == ILLEGAL_UID ? UNKNOWN_UID : myself->uid,
|
|
myself->gid,
|
|
strbuf, getenv ("HOME") ?: "");
|
|
debug_printf ("Completing /etc/passwd: %s", linebuf);
|
|
add_line (linebuf);
|
|
}
|
|
}
|
|
|
|
struct passwd *
|
|
internal_getpwsid (cygpsid &sid)
|
|
{
|
|
struct passwd *pw;
|
|
char *ptr1, *ptr2, *endptr;
|
|
char sid_string[128] = {0,','};
|
|
|
|
pr.refresh (false);
|
|
|
|
if (sid.string (sid_string + 2))
|
|
{
|
|
endptr = strchr (sid_string + 2, 0) - 1;
|
|
for (int i = 0; i < pr.curr_lines; i++)
|
|
if ((pw = passwd_buf + i)->pw_dir > pw->pw_gecos + 8)
|
|
for (ptr1 = endptr, ptr2 = pw->pw_dir - 2;
|
|
*ptr1 == *ptr2; ptr2--)
|
|
if (!*--ptr1)
|
|
return pw;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
struct passwd *
|
|
internal_getpwuid (__uid32_t uid, bool check)
|
|
{
|
|
pr.refresh (check);
|
|
|
|
for (int i = 0; i < pr.curr_lines; i++)
|
|
if (uid == (__uid32_t) passwd_buf[i].pw_uid)
|
|
return passwd_buf + i;
|
|
return NULL;
|
|
}
|
|
|
|
struct passwd *
|
|
internal_getpwnam (const char *name, bool check)
|
|
{
|
|
pr.refresh (check);
|
|
|
|
for (int i = 0; i < pr.curr_lines; i++)
|
|
/* on Windows NT user names are case-insensitive */
|
|
if (strcasematch (name, passwd_buf[i].pw_name))
|
|
return passwd_buf + i;
|
|
return NULL;
|
|
}
|
|
|
|
|
|
extern "C" struct passwd *
|
|
getpwuid32 (__uid32_t uid)
|
|
{
|
|
struct passwd *temppw = internal_getpwuid (uid, true);
|
|
pthread_testcancel ();
|
|
return temppw;
|
|
}
|
|
|
|
extern "C" struct passwd *
|
|
getpwuid (__uid16_t uid)
|
|
{
|
|
return getpwuid32 (uid16touid32 (uid));
|
|
}
|
|
|
|
extern "C" int
|
|
getpwuid_r32 (__uid32_t uid, struct passwd *pwd, char *buffer, size_t bufsize, struct passwd **result)
|
|
{
|
|
*result = NULL;
|
|
|
|
if (!pwd || !buffer)
|
|
return ERANGE;
|
|
|
|
struct passwd *temppw = internal_getpwuid (uid, true);
|
|
pthread_testcancel ();
|
|
if (!temppw)
|
|
return 0;
|
|
|
|
/* check needed buffer size. */
|
|
size_t needsize = strlen (temppw->pw_name) + strlen (temppw->pw_dir) +
|
|
strlen (temppw->pw_shell) + strlen (temppw->pw_gecos) +
|
|
strlen (temppw->pw_passwd) + 5;
|
|
if (needsize > bufsize)
|
|
return ERANGE;
|
|
|
|
/* make a copy of temppw */
|
|
*result = pwd;
|
|
pwd->pw_uid = temppw->pw_uid;
|
|
pwd->pw_gid = temppw->pw_gid;
|
|
pwd->pw_name = buffer;
|
|
pwd->pw_dir = pwd->pw_name + strlen (temppw->pw_name) + 1;
|
|
pwd->pw_shell = pwd->pw_dir + strlen (temppw->pw_dir) + 1;
|
|
pwd->pw_gecos = pwd->pw_shell + strlen (temppw->pw_shell) + 1;
|
|
pwd->pw_comment = NULL;
|
|
pwd->pw_passwd = pwd->pw_gecos + strlen (temppw->pw_gecos) + 1;
|
|
strcpy (pwd->pw_name, temppw->pw_name);
|
|
strcpy (pwd->pw_dir, temppw->pw_dir);
|
|
strcpy (pwd->pw_shell, temppw->pw_shell);
|
|
strcpy (pwd->pw_gecos, temppw->pw_gecos);
|
|
strcpy (pwd->pw_passwd, temppw->pw_passwd);
|
|
return 0;
|
|
}
|
|
|
|
extern "C" int
|
|
getpwuid_r (__uid16_t uid, struct passwd *pwd, char *buffer, size_t bufsize, struct passwd **result)
|
|
{
|
|
return getpwuid_r32 (uid16touid32 (uid), pwd, buffer, bufsize, result);
|
|
}
|
|
|
|
extern "C" struct passwd *
|
|
getpwnam (const char *name)
|
|
{
|
|
struct passwd *temppw = internal_getpwnam (name, true);
|
|
pthread_testcancel ();
|
|
return temppw;
|
|
}
|
|
|
|
|
|
/* the max size buffer we can expect to
|
|
* use is returned via sysconf with _SC_GETPW_R_SIZE_MAX.
|
|
* This may need updating! - Rob Collins April 2001.
|
|
*/
|
|
extern "C" int
|
|
getpwnam_r (const char *nam, struct passwd *pwd, char *buffer, size_t bufsize, struct passwd **result)
|
|
{
|
|
*result = NULL;
|
|
|
|
if (!pwd || !buffer || !nam)
|
|
return ERANGE;
|
|
|
|
struct passwd *temppw = internal_getpwnam (nam, true);
|
|
pthread_testcancel ();
|
|
|
|
if (!temppw)
|
|
return 0;
|
|
|
|
/* check needed buffer size. */
|
|
size_t needsize = strlen (temppw->pw_name) + strlen (temppw->pw_dir) +
|
|
strlen (temppw->pw_shell) + strlen (temppw->pw_gecos) +
|
|
strlen (temppw->pw_passwd) + 5;
|
|
if (needsize > bufsize)
|
|
return ERANGE;
|
|
|
|
/* make a copy of temppw */
|
|
*result = pwd;
|
|
pwd->pw_uid = temppw->pw_uid;
|
|
pwd->pw_gid = temppw->pw_gid;
|
|
pwd->pw_name = buffer;
|
|
pwd->pw_dir = pwd->pw_name + strlen (temppw->pw_name) + 1;
|
|
pwd->pw_shell = pwd->pw_dir + strlen (temppw->pw_dir) + 1;
|
|
pwd->pw_gecos = pwd->pw_shell + strlen (temppw->pw_shell) + 1;
|
|
pwd->pw_comment = NULL;
|
|
pwd->pw_passwd = pwd->pw_gecos + strlen (temppw->pw_gecos) + 1;
|
|
strcpy (pwd->pw_name, temppw->pw_name);
|
|
strcpy (pwd->pw_dir, temppw->pw_dir);
|
|
strcpy (pwd->pw_shell, temppw->pw_shell);
|
|
strcpy (pwd->pw_gecos, temppw->pw_gecos);
|
|
strcpy (pwd->pw_passwd, temppw->pw_passwd);
|
|
return 0;
|
|
}
|
|
|
|
extern "C" struct passwd *
|
|
getpwent (void)
|
|
{
|
|
if (_my_tls.locals.pw_pos == 0)
|
|
pr.refresh (true);
|
|
if (_my_tls.locals.pw_pos < pr.curr_lines)
|
|
return passwd_buf + _my_tls.locals.pw_pos++;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
extern "C" struct passwd *
|
|
getpwduid (__uid16_t)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
extern "C" void
|
|
setpwent (void)
|
|
{
|
|
_my_tls.locals.pw_pos = 0;
|
|
}
|
|
|
|
extern "C" void
|
|
endpwent (void)
|
|
{
|
|
_my_tls.locals.pw_pos = 0;
|
|
}
|
|
|
|
extern "C" int
|
|
setpassent ()
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
extern "C" char *
|
|
getpass (const char * prompt)
|
|
{
|
|
char *pass = _my_tls.locals.pass;
|
|
struct termios ti, newti;
|
|
|
|
cygheap_fdget fhstdin (0);
|
|
|
|
if (fhstdin < 0)
|
|
pass[0] = '\0';
|
|
else
|
|
{
|
|
fhstdin->tcgetattr (&ti);
|
|
newti = ti;
|
|
newti.c_lflag &= ~ECHO;
|
|
fhstdin->tcsetattr (TCSANOW, &newti);
|
|
fputs (prompt, stderr);
|
|
fgets (pass, _PASSWORD_LEN, stdin);
|
|
fprintf (stderr, "\n");
|
|
for (int i=0; pass[i]; i++)
|
|
if (pass[i] == '\r' || pass[i] == '\n')
|
|
pass[i] = '\0';
|
|
fhstdin->tcsetattr (TCSANOW, &ti);
|
|
}
|
|
return pass;
|
|
}
|